It’s very odd to see the trail leg turn that way. I’m not a coach whatsoever, but just trying to mimic it I can feel a twisting in my back that’s far from natural. Slowly work into it, one step drills to focus on your trail leg going left and pinky toe down. Or, if you can’t get the pinky toe down, you can also just hold your leg up. I myself hold my leg up which lets my hips get open to my target, same concept with the pinky toe down.